Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cao suc » cao su, cao duc
hanh de » hanh ve, hanh kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
suc van » su van, duc van, luc van
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
de cua » le cua, te cua, dieu cua
sac ky » cac ky, sai ky
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sac ky)) nang xa hoi. ((hieu ve) or (hieu va)) cao suc van hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sac ky)) nang xa hoi. ((hieu ve) OR (hieu va)) cao suc van hanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sac ky)) nang xa hoi. ((hieu ve) or (hieu va)) cao suc van hanh de cua te".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) OR (sac ky)) nang xa hoi. ((hieu ve) or (hieu va)) cao suc van hanh de cua te*.